condition mean min max ZT0-3 0.696755 0.696755 0.696755 ZT4-7 0.0 0.0 0.0 ZT8-11 0.78567 0.78567 0.78567 ZT12-15 0.95955 0.95955 0.95955 ZT16-19 0.0 0.0 0.0 ZT20-23 0.420292 0.420292 0.420292